Vertical exhaust type sealing closure for sealed container

ABSTRACT

This invention relates to a vertical exhaust type sealing closure for sealed container, comprising: a closure body and a chute seat provided in the axial direction thereof; an air plug provided in the chute seat; a piston provided in the chute seat and above the air plug as well, an operating portion being combined at the upper end of the piston; when the operating portion is grasped to conduct continuous up-to-down reciprocating motion of the piston, opening and closing action of the air plug can be produced so as to extract the air contained in the sealed container.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a vertical exhaust type sealing closure for a sealed container, more particularly to a novel vertical exhaust type sealing closure for sealed container which is easy and convenient in operation.

2. Brief Description of the Prior Art

Moisture contained in ambient air often causes foodstuffs become deteriorated, rotten, even mildewed. Frequently, foodstuffs, seasonings or additives cannot run out at one time, so the storage and fresh-keeping of these things will become an issue necessary to solve. However, almost ordinary containers emphasize their capacities of receiving stuffs only, and take advantage of refrigerator to keep things fresh. Since not all the foodstuffs are suitably to be preserved within refrigerator, a sealed jar for separating foodstuffs from ambient air is developed to meet the requirement, so as to avoid foodstuff from getting deteriorated and wetted or from attracting ants, cockroaches and mice.

Sealed jar ordinarily well seen in early stage was a syringe-extraction type one over which an extraction pump is provided. In usage, the air contained within the sealed jar is extracted out by repeatedly conducting compression and extraction of the extraction pump. However, not only the extraction pump provided on the sealed jar occupies a large space, but also storage or access of the extraction pump, in case the extraction pump and the sealed jar are mutually separated, becomes inconvenient or even causes the extraction pump get lost easily so that the sealed jar becomes no more reusable. Therefore, a lot of trouble is encountered in the constitution and usage of this configuration.

Hence, concerning industry has proposed a sealed jar as shown in FIG. 1, in which it essentially has a moving bottom plate (12) provided on the bottom portion of a container body (11) and a cover body (14) in thread engagement on an opening end (13). The moving bottom plate (12) has a leak-proof gasket (15) interposed at peripheral side thereof. An air intake (16) for receiving a check valve (17) is provided at a place opposite to the opening end (13). A piston cavity (18) wherein a piston rod (19) penetrates in its axial direction is extended horizontally in the interior of the sealed jar. Configuring like this, users merely pull and push the piston rod (19) to conduct horizontal reciprocating movement, the air can be extracted out of the sealed jar by the coordinated motion between the air intake (16) and the check valve (17).

However, air extraction of the above sealed jar is conducted by taking the piston cavity (18) provided horizontally in the cover body (14) and the small one-way air intake (16) as the only passage for internal and external gases exchange or delivery. Hence, the air quantity of extraction is quite limited. Furthermore, operator has to apply force to and fro in countless number of times, needless to say it is laborious and time consuming.

In view of the above reasons, the inventor of the present invention hereby proposes a novel sealing closure according to the research and further improvement directed to conventional structure and disadvantages thereof, based on his profound experience in R&D and manufacturing in relevant field, so as to achieve the goal of better practical value.

SUMMARY OF INVENTION

The main object of the present invention is to provide a vertical exhaust type sealing closure for sealed container, which has advantages of simple structure and quick extraction.

The vertical exhaust type sealing closure for sealed container of the present invention can be realized by the following technology.

The vertical exhaust type sealing closure for sealed container of the present invention comprises: a closure body and a chute seat provided in the axial direction thereof; an air plug provided in the chute seat; a piston provided in the chute seat and above the air plug as well, an operating portion being combined at the upper end of the piston; when the operating portion is grasped to conduct continuous up-to-down reciprocating motion of the cylinder, opening and closing action of the air plug can be produced so as to extract the air contained in the sealed container.]

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing the structure of a conventional sealing closure.

FIG. 2 is a perspective exploded view showing the sealing closure of the present invention.

FIG. 3 is a perspective assembly view showing the sealing closure of the present invention.

FIG. 4 is a partial enlarged view of FIG. 3.

FIG. 5 is a schematic view showing that the sealing closure of the present invention is conducting air extraction.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

The objects, the technical means and the expected effect of the present invention will become more apparent from the detailed description of the preferred embodiment in conjunction with the accompanying drawings.

Referring to FIG. 2, the vertical exhaust type sealing closure for sealed container of the present invention comprises a closure body (2), an air plug (3) and a piston (4).

The closure body (2) has a chute seat (21) provided in the axial direction thereof and a plurality of vent holes (22) are provided on the bottom surface of the chute seat (21).

The air plug (3) is disposed on the bottom surface of the chute seat (21), which has a diaphragm (31) of umbrella-shape configured to cover the vent holes (22) provided on the bottom surface of the chute seat (21).

The piston (4) is an actuator having a bottom surface, which is disposed within the chute seat (21).

Configuring in this manner, when the piston (4) is displaced upwardly in extraction stroke, a suction force is generated in the chute seat (21) to cause upward bending deformation of the diaphragm (31) of the air plug (3), so there is a gap produced between the air plug (3) and the vent holes (22) of the closure body (2), and the air contained in the sealed container (6) is sucked out through the gap to the chute seat (21). On the contrary, if the piston (4) is in its downward displacement stroke, the air in the chute seat (21) is compressed by the piston (4) so that the diaphragm (31) of the air plug (3) is in tight contact on the vent holes (22) of the closure body (2), and the air in the chute seat (21) is prevented from returning to the sealed container (5), hence the compressed air is discharged out to the ambience through the tiny slit between the piston (4) and the chute seat (21). Accordingly, when the piston (4) conducts repeated extraction and compression by reciprocating movement in up-and-down direction, the air contained within the sealed container (5) can be ensured to be exhausted to the outside so that the sealed container (5) is maintained at a negative pressure state to achieve sealing effect. Moreover, as the piston (4) is disposed on the upper end face of the closure body (2), the plane area of the chute seat can be designed to be in a bigger range. When this is cooperated with the air extraction performed by the piston (4) arranged in vertical direction, the quantity of air exhausted out in a single extraction conducted by the piston (4) is much more than that conducted by a conventional piston arranged in horizontal direction. Hence, the purpose of quick sealing with less frequency of reciprocating movement of the piston (4) can be achieved in sealing operation.

The vertical exhaust type sealing closure for sealed container of the present invention further comprises a partition panel (23) which is mounted within the chute seat (21) and located above the air plug (3). A plurality of perforations (231) are provided on the partition panel (23) such that the air extracted from the sealed container (5) passes through the perforations (231) into the space between the partition panel (23) and the piston (4). Furthermore, the air plug (3) is limited by the partition panel (23) in such a manner that the air plug (3) is avoided to be detached from the bottom of the chute seat (21) during the reciprocating movement in up-and-down direction of the piston (4).

The vertical exhaust type sealing closure for sealed container of the present invention further comprises a pressure relief element (24) which is provided on a through hole (25) penetrating the closure body (2). In normal state, the pressure relief element (24) is in tight fitting with the through hole (25). When the sealing closure is ready to be opened, the pressure relief element (24) is directly pressed so that the pressure relief element (24) is no more in tight fitting with the through hole (25) and thus a gap is formed therebetween. Thereby, ambient air is inputted into the sealed container (5) through the gap until the pressure in the sealed container (5) is balanced with the ambient air pressure, so that the sealed container (5) can be opened smoothly.

The vertical exhaust type sealing closure for sealed container of the present invention further comprises a hand grip (41) provided on the piston (4), which is gripped by the hand of user to conduct the reciprocating movement in up-and-down direction of the piston (4).

The vertical exhaust type sealing closure for sealed container of the present invention further comprises a shielding cover (26) combined on the outer skirt of the bottom of the chute seat (21). The inner surface of the shielding cover (26) has at least one communicating groove (261) in shallow recess shape. The presence of this communicating groove (261) provides a gap formed between the inner surface of the shielding cover (26) and the outer surface of the chute seat (21) after the shielding cover (26) is combined with the chute seat (21), so that air can either pass in or out through the gap. Simultaneously, powder substance or like contained within the sealed container (5) can be prevented from entering into the chute seat (21) through the vent holes (22) by the provision of the shielding cover (26).

It is to be understood that the forms of the invention herewith shown and described are to be taken as preferred embodiments of the same, and that various changes, size and arrangement of parts may be resort to, without departing from the spirit of the invention or scope of the subjoined claims. 

1. A vertical exhaust type sealing closure for sealed container, comprising: a closure body having a chute seat provided in the axial direction thereof, a plurality of vent holes being provided on the bottom surface of said chute seat, a through hole penetrating said closure body being provided for housing a pressure relief element; an air plug disposed within said chute seat to cover the vent holes, which control flow direction of air by the action of a piston; and a piston conducting reciprocating movement in up-and-down direction within said chute seat.
 2. A vertical exhaust type sealing closure for sealed container as claimed in claim 1, wherein said piston has a hand grip attached thereto.
 3. A vertical exhaust type sealing closure for sealed container as claimed in claim 1, wherein said sealing closure further comprises a partition panel mounted within the chute seat and located above said air plug, a plurality of perforations being provided on said partition panel.
 4. A vertical exhaust type sealing closure for sealed container as claimed in claim 1, wherein a shielding cover is combined on the outer skirt of the bottom of said chute seat, a gap being formed between the inner surface of said shielding cover and the outer surface of said chute seat for the passing in or out of gas.
 5. The vertical exhaust type sealing closure for sealed container as claimed in claim 4, wherein said gap is formed by the provision of at least one communicating groove on the inner surface of said shielding cover.
 6. A vertical exhaust type sealing closure for sealed container as claimed in claim 1, wherein an air plug has a diaphragm to cover the vent holes provided on the bottom surface of the chute seat. 